钢筋混凝土静力等效简化模型的数值模拟

钢筋混凝土是由钢筋和混凝土构成的复合材料,属于非均质、非线性材料.在数值分析中要分别采用不同材料、单元类型模拟(即建立分离模型),这种模拟方式计算量过大,不适于对其整体结构进行分析.通过抗弯刚度等效的简化方式,建立了钢筋混凝土的均质等效模型,借助有限元软件对所建均质模型和分离模型进行了线性、非线性的静力模拟,由对结果的比较,确定简化模型的材料参数,为钢筋混凝土结构的静力模拟分析奠定基础.

Numerical Simulation by Simplified Equivalent Static Model of Reinforced Concrete

As a composite made up of reinforcing bar and concrete,reinforced concrete is a kind of heterogeneous non-linear material.In its numerical analysis,a disjunctive model by simulating different materials and element types respectively would be unsuitable for the analysis of its integral structure due to large amount of calculation.This paper establishes a ho-mogeneous equivalent model of reinforced concrete by a simplified way of the equivalent flexural rigidity.And then it deter-mines the material parameters for the simplified model by comparing the results from the linear and non-linear static simula-tions of the homogeneous and disjunctive models with ANSYS,thus laying the foundation for the numerical simulation analysis of the reinforced concrete structure.